Application of air ions for bacterial de-colonization in air filters contaminated by aerosolized bacteria

Yang Seon Kim, Ki Young Yoon, Jae Hong Park, Jungho Hwang

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


We aerosolized the Escherichia coli (E. coli) and Staphylococcus epidermidis (S. epidermidis) bacteria and collected them on membrane filters. Then we generated air ions by applying a high voltage to a carbon fiber tip and applied them to the contaminated filters. The antibacterial efficiency was not significantly affected by the bacteria being Gram-positive or Gram-negative, however, negative ions showed a lower antibacterial efficiency than positive ions to both E. coli and S. epidermidis, even though the concentration of negative air ions was much higher than that of positive air ions. With a field emission scanning electron microscope (FE-SEM) images and fluorescence microscopy images using a LIVE/DEAD BacLight Bacterial Viability Kit, electrostatic disruption of the bacteria was found to be the dominant antibacterial effect.

Original languageEnglish
Pages (from-to)748-755
Number of pages8
JournalScience of the Total Environment
Issue number4
Publication statusPublished - 2011 Jan 15

Bibliographical note

Funding Information:
This research was supported by the Converging Research Headquarter for HCE Program funded by the Ministry of Education, Science and Technology (2010K001143).

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution


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